Whats the difference between LDraw and MLCad?
In short – LDraw is the system that MLCad runs off of. MLCad is what is termed a ‘second generation editor’ of the LDraw file format. A second generation editor is any editor written after James Jessiman’s original DOS-based LEdit editor. LDraw is the file system and the source of the file system MLCad uses. For information on how to properly refer to LDraw-based 3D LEGO-modelling tools, check out a letter on the topic from the LDraw.org staff.